Stapling machine



March 2, 1954 H w, MARANQ 2,670,468

' STAPLING MACHINE Filed Jan. 8, 1955 Patented Mar. 2, 1954 y UNITEDSTATES PATENT 0 F FICE i STAPLI'NG MACHINE U Herbert W. Marano,Brooklyn, N. Y., assigner to Wilsonflones Company, Chicago, Ill., .acorporation .of Massachusetts Application January 8, 1953, 'Serial No.330,337 l The present :invention relates to .staple drivers, and inparticular to .staple .drivers .comprising a base, an upper cover memberincluding a driving ram .and an interpositioned lower memberconstituting ,a staple magazine. lThe present invention is aoontinuation-in-zpart of the invention disclosed and claimed .in .mycopending .application Serial No. 158,462, filed April 27 19.5.0., nowPatent No. 2,624,878, issued .January 13, 19.5.2, .and relatesspecifically to the means for releasably securing the magazine to thecover .and driving ram assembly. lThe l.particular Vdetails of vthestaple driving `.operation .are not .important to an -understand-ing ofthe present invention, and these will be detailed inthe ccpendin-g case,

In previous devices of this general construction, in order to provide areasonably good engagement between the magazine and cover., it wasVnecessary to nianufacture and assemble the parts to close tolerances.This, of course, .made .assembly .a relatively slow process and :greatlyincreased the costei manufact-ure of the device.. 'heymain .object ofthe present invention, therefore, :is the provision o1" aninterengagement between the magazine :and cover which may be achievedeasily and simpl-y, using parts with relatively -w-ide tolerances,thereby to increase assembly and reduce the cvereall cost .of thedevice, while retaining all the necessary `operational functions, asready relative displacement of the cover and `1m,ag-azine., e

The present invention is characterized by the use of reverselfv lbentspring :legs depend-ing from the underside of the cover interengaszngthe iorwardly bent edges of the iront wall of the 'magazine. Thedepending spr-ing fingers arcvery easiltT displacable to permitsame toride ever the iront wall of the magazine during engagement and dis..engagement of thecover and magazine.

In the drawings annexed hereto, and forming a pant hereof,

Figure 1 is a side elevational View or one form of staple driving deviceembodying the improvement of the present invention, with a portionthereof broken away and sectioned;

Figure 2 is an enlargedffront `elevational view of the magazine andcover assembly, with the cover sectioned to reveal structural details;

Figure 3 is an enlarged side elevational view of the front of the coverand magazine assembly with the cover sectioned to reveal structuraldetails; and

Figure 4 is a section on the line 4-4 of Figure 3.

The normally horizontally extended base I0, a channel-shape staplemagazine assembly l2 open at the top thereof, and a cover I4 of invertedchannel-shape are all pivotally pinned together at the rear thereof, asindicated by reference numeral lit. A pair loi spaced apart standardsare mounted atop lbase le between which the staple magazine 12, thelower member, and -cover I4, the upper member, are pivotally disposed,Cover 1I-4 is provided -with a depending skirt ,i8 along the sides andiront. AOn .the underside of the cover, there is secured as by rivets2t, 2li a driving member 22 of ila-t spring steel, having an integraldownwardly projecting staple driving component 2t at the forward endthereof, A cover guide 2t is provided comprising an inverted channelshaped stamping pivoted with cover I4 at 'I6 and having a forwardlyextended T-tongue 28 projecting through a rectangular opening 30 indriving blade 24. Spring `means `(not shown.) are provided within vcoverlll normally to .urge guide 2li dow wardly from cover .lll into therelation `shown ,in Figures 2 and 3.

Between drive .member 22 and the underside of cover i4, there isdisposed a flat member of spring metal 32 having a bifurcated,downwardly angled .component 34 at the front thereof, dehning .springlegs .3.5, .3S between ram blade 24 and the front .skirt it. Theterminals of legs 3.5, 3.6 are reversely and rearwardly bent, as at 38.

Magazine .l2 is'generaliy U-shaped, open at the top, and is providedwith a front wall d extended above the level of .the side walls 42thereof, said front wall being provided at its upper end with a pair of.forwardly curved lips 4,4 Aspaced ,apart thesame distance as legs 3 6,.35 and bends 38, 3,8.

.As will be readily understood, magazine l2 comprises the usual staplereceptacle and means therein to urge the staples toward .the frontthereof, at which point the staples are driven downwardly against .baselll when cover le is `depressed and blade 24 driven downwardly againstthe rear face of magazine iront wall itl). Normally, it is desirablethat magazine l2 and vcover I4 swing as a unit about pivot I6. However,it becomes necessa'r'yto obtain .access to the interior of magazine l2to load staples thereunto, andthe cover and magazine must be separated.

'The cover andmagazine are shown in Figures 2*, 3 and 4 .engaged formovement simultaneously with respect to base 'I D., Forwardly bent lips4,4, :i4 extend over the ends of reverse bends 38, 38. During operationof the device, when cover I4 is manually depressed against base Il!bearing magazine I2 along with it, cover lll moves downwardly withrespect to said magazine and legs 36, 36 ride downwardly along the outeri ace of magazine wall 40 until driver blade 24 ejects the staple inline with it. As pressure is released on the cover, it will first risewith respect to magazine l2 until bends 38, 38 bear against and engagelips M, M whereupon the magazine will then be borne along with thecover.

When it is desired to separate the cover from the magazine to expose theinterior of the latter, the sides of the magazine near the front thereofare held in one hand, while the cover is grasped in the other hand andsimply pulled apart, with the bends 38, 38 riding over and free of lips44, 4I. Due to the springiness of bends 38, 38 and their associatedlegs, it is obvious that no great tolerances are required, and that evena slop t will nevertheless be effective for all practical purposes.

The parts of my device need not be'machined, but may be stamped easilyand quickly, and relatively inexpensively. With suitably spaced guideapertures for the Ariveting 28, the cover, driver, guide and spring maybe assembled very easily and even by relatively unskilled labor. Thefeatures of the present invention are the forwardly arched lips 44 atthe top of the front wall of the magazine and the cooperating springlegs 36 which are rearwardly biased (seen Figures l and 3) incombination with the reverse bends 38, 38 at the ends thereof.

Having now described my invention, what I claim and desire to secure byLetters Patent are: 1. In a stapling machine comprising a base, an uppercover member of inverted channel shape and a staple driver bladeprojecting downwardly therefrom at the front end thereof and spaced fromsaid front end, with the rear end of the upper member being pivotallysupported on the rear of the base, a lower member of channel shape openat the top and forming a, magazine for staples, the rear end of thelower member being pivotally supported at the rear end of the uppermember, a driver guide between the upper and lower members interengagedwith the upper member to pivot therewith, the cover and the guide beingmanually separable from the lower member substantially simultaneously toexpose the interior of said lower member, and releasable spring meansdepending from the underside of the upper member 'between the frontthereof and the driver blade yieldably to engage and retain therewiththe lower member.

2. In a stapling machine comprising a base, an upper cover member ofinverted channel shape and a staple driver blade projecting downwardlytherefrom at the front end thereof and spaced from said front end, withthe rear end of the upper member being pivotally supported on the rearof the base, a lower member of channel shape and having an upstandingfront wall, said lower member being open at the top and forming amagazine for staples, the rear end of the lower member being pivotallysupported at the rear end of the upper member, a driver guide betweenthe upper and lower members interengaged with the upper member to pivottherewith, the cover and the guide being manually separable from thelower member substantially simultaneously to expose the interior of saidlower member and releasable spring means depending from the under- 4side of the upper member between the front thereof and the driver blade,said spring means terminating in a reverse bend yieldably to engage thefront wall of the lower member and retain therewith the said lowermember.

3. In a stapling machine comprising a base, au upper cover member ofinverted channel shape and a staple driver blade projecting downwardlytherefrom at the front endv thereof and spaced from said front end, withthe rear end of the upper member being pivotally supported on the rearof the base, a lower member of channel shape having an upstanding frontwall terminating in forwardly curved portions, said lower member beingopen at the top and forming a magazine for staples, the rear end of thelower member being pivotally supported at the rear end of the uppermember, a, driver guide between the upper and lower members interengagedwith the upper member to pivot therewith, the cover and the guide beingmanually separable from the lower member substantially simultaneously toexpose the interior of said lower member and releasable spring meansdepending downwardly and rearwardly from the underside of the uppermember between the front thereof and the driver blade, said spring beingbifurcated at its lower end, the bifurcations terminating in reversebends yieldably to engage the portions of the front wall of the lowermember and retain therewith the said lower member.

4. In a stapling machine comprising a, base, an upper cover member, andan intermediately disposed lower member, a staple driving bladeprojecting downwardly from the upper cover member at the front endthereof and spaced rearwardly of said front end, the rear end of saidupper member being pivotally supported on the rear of the base, thelower member forming a magazine for staples, the rear end of said lowermember being pivotally supported at the rear end of the base on a commonpivot with the upper member, the lower member having a front wall thetop of which extends forwardly of the lower member, the front end of thecover being manually separable from the front end of the lower member toexpose the magazine, and releasable spring means depending from theunderside of the upper member yieldably to engage the front wallextension of the lower member.

5. In a stapling machine as in claim 4, wherein the releasable springmeans depend from the upper member between the driver blade and thefront end of said cover member.

6. In a stapling machine as in claim 5, wherein the end of thereleasable spring means is rearwardly extended.

HERBERT W. MARANO.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 2,603,781 Ruskin July 22, 1952 FOREIGN PATENTS Number CountryDate 587,132 GreatBritain Apr. 15, 1947

